The US Federal Police FBI has classified serial strangler Michael Penttilä as the only Finnish serial killer. Penttilä himself does not think the FBI's classification is correct. - It's silly. A serial killer must have, within a certain period of time, three acts that took place under the name of murder and were done in the same way. I throw things like this in the trash, Penttilä says in the evening's special interview with "Crime Scene". Born as Jukka Torsten Lindholm in 1965, adopted the name Michael Maria Penttilä in 2009 and began claiming to be a lesbian woman.